z/VM: CP Commands and Utilities Reference - z/VM - IBM

SET VDISK
Usage Notes
Messages
HCP002E Invalid operand - operand
nnnnnnnM
specifies the number of megabytes of storage available for virtual disks in
storage. If the number specified is equal to or greater than 1048576, the limit is
set to INFINITE.
nnnnG
specifies the number of gigabytes of storage available for virtual disks in
storage. If the number specified is equal to or greater than 1024, the limit is set
to INFINITE.
1. Virtual disks in storage are allocated in 8-block (4096-byte) pages. Therefore,
the actual limit that is set may be rounded up to the nearest page.
2. If the system limit is set to a value that is less than the amount of storage
currently allocated for virtual disks in storage, the command is accepted, but no
new virtual disks in storage can be created until the total system usage drops
below the limit. No currently-active virtual disks in storage are deleted.
3. If the user limit is set to a value that is less than the amount of storage currently
allocated for virtual disks in storage created by the DEFINE command by a
given user, the command is accepted, but that user cannot create any new
virtual disks in storage with the DEFINE command until the user’s total usage of
virtual disks in storage created with the DEFINE command falls below the limit.
No currently-active virtual disks in storage are deleted.
4. While virtual disks in storage can improve I/O performance, they may increase
storage and paging resource requirements. Increasing the system and user
limits increases the potential for end users to negatively impact system
performance by using large virtual disks in storage improperly.
HCP003E Invalid option - [command contains
extra option(s) starting with] option
HCP026E Operand missing or invalid
1416 z/VM: CP Commands and Utilities Reference